Moritz

Frank Selen has been collecting sand since the 80s: nearly 500 numbered samples, each pinned with date and giver. No. 126 is from the foot of an East German watchtower, 166 from the Sahara, reached by Land Rover. #MapOfTheDay #SandCollection

Homemade rap songs about German hometowns, one pin per town: "Ba Ba Bamberg", "Ich bin ein Meppener", "Lehrte Rap!". mademoiselle_kriminell adds dry reviews, like: up to 3:06 it went pretty well, but then they decided to keep the outro after all. #MapOfTheDay #DeutschRap

One geology stop a day for all of 2013: Oregon's coast, lava fields and Crater Lake. Seven days in a row went to tafoni, the honeycombed rock at Shore Acres. Thanksgiving's entry: "Thankful for the Rocks We Could Get At". #MapOfTheDay #Geology #Oregon

From Saltdean on the Sussex coast, Mike Fallon has picked up more than 600 digital radio transmitters with a nine-element antenna 12 m up, facing an open sea horizon. His farthest pin: Eisenhüttenstadt on the Polish border, over 1,000 km away. #MapOfTheDay #RadioDX #SDR

Brian Grover mapped Shikoku's 88-temple pilgrimage by bike: temples, hot springs, bike shops, free pilgrim huts and cheap beds. Among the cheap beds: a cemetery, ¥300, with a note from day 13: "First time sleeping in a graveyard." #MapOfTheDay #Shikoku #Cycling

6 July 1906: Baron Mannerheim takes the midnight train from St Petersburg, sent by the Tsar to spy on China. 6 July 2006: this map's author takes the same train and follows him to Beijing. Secret police and a detour to the "Gates of Hell" included. #MapOfTheDay #SilkRoad